Device for connecting together members such as scaffold-poles and the like.



D. PALMER-MINES.

DEVICE FOR CONNECTING TOGETHER MEMBERS SUCH AS SCAFFOLD POLES AND THE LIKE.

APPLICATION FILED AUG-I3. I918.

Patented Apr. 15, I919.

R m w m HIS ATTORNEYS STATES PATENT OFFICE.

DANIEL Pumas-Jonas, or srooxwnnn, LONDON,

. TO THE. PATENT RAPID SCAFFOLD THE COMPANY .LIMITED, 01? STOCKWELL,

ENGLAND.

nnvrcn son connncrx ve rosmnna'mnmnnas sucn as scarroLn-roLEs AND THE LIKE.

Spechlcation of Letters Patent. Patented Apr. 15, 1919.

Application filed August 1a, 1918. Serial No. 249,620.

To all whomit may concern Be it known that I, DANIEL PALMER-JONES, a subject of the Kin of Great Britain residin at Stockwelh'in the county of London, %lnland, have invented certain new and use 111 Improvements in Devices for Connecting Together Me'm'bers Such as Scaffold-Poles and the like, of which the following'is a specification. v

The present invention refers to improvements in "devices such as have already been constructed for connectin together members such as scaffold p'oles ahg the like; each of such devices comprised a pressur'e plate to bear against one ofthe' menibers'to be secured, from which pr'essure plate a stem rigid therewith extendedapproximately at right angles therefrom, screwthreaded to receive a lubly mounted upon which nut was a plate havin hook-like parts or horns hereinafter terme the horn plate upon which horns the ends of a chain could be engaged, which chain was passed around the members to be clamped together, so that by revolving the nut the horn plate would be distanced from the pressure plate and the chain brought into tension to clamp the member.

Such a construction, although essentially successful, yet presented some difiiculties of manufacture, among which may be mentioned as examples, that it was necessary to screwthread the stem which was integral with the pressure plate as near as possible to its junction therewith, and it was further necessary to construct the two-part member consisting of the horn plate and the flanged nut, so that they could be held permanently together while permitting the flanged nut to revolve relatively to the horn plate.

Now in such devices it is essential that they should possess considerable strength and not be capable of being easily damaged, while at the same time it IS important that the parts composing the device should be few in number and of a simple construction in view of the urposes for which they are employed; and the cost of manufacture is an important factor in rendering such devices capable of general employment, and therethef *stemf bein 7 flanged nut, retro lindrical stem which is formed integral with the pressureplate,while the horn plate consists simply of a block or disk centrally bored and screw-threaded to engage the thread of the sleeve and formed with horns to engage chains or the like, and thus the revoluble screwed sleeve is supported throughout its length by the stem which is formed with and rojects rigidly from the pressure plate. T e supporting of the revoluble sleeve throughout its length upon the rigid plain stem is an important factor in the success of the construction according to this invention.

An example of construction of the invention will now be described with reference to the accompanying drawings, whereon Figure 1 shows in sectional plan view, one of the many applications of the invention, in which the device is illustrated engaging the two ends of a chain and tensioning the same by the device taking its bearing and acting against a scaffold pole.

Fig. 2 shows the device drawn to a larger scale and in sectional elevation.

Fig. 3 is an elevation showing the pressure plate and stem detached.

Fig. 4 is a sectional elevation showing the screw threaded sleeve detached.

Fig. 5 is a side elevation, and Fig. 6 is a front elevation, showing the horn plate detached.

In the accompanyin drawings the pressure plate 1 is shown 0 disk formation, and where, as generally it is to be, in face contact with a member to be clamped of cylindrical shape such as the scaffold pole 2 Fig. 1, the said pressure plate is made to conform with such configuration, and on its contacting ENGLAND, ASSIGNOR 0F ONE-HALF I face the pressure plate 1 is made with a tooth or spur 3, which is adapted to enter the member beingv clamped.

Proceeding about ri ht angles from and formed inte ral with t e pressure plate is a plain cy-lin rioal 4, uponwhieh'is' slid a sleeve 5, upon the stem 4 and having its end bearing on the pressnre plate 1 as shown at Fig. 2, and the sleeve 5 1s screw-threaded externally it is adapted to receive key or other spanner} the end of 'fihestem4 pro ects beyond the sleeve 5 to provide means 1 which said tooth or spur can be driven in one of the members to be clamped.

' Screwed upon the sleeve 5 isablock or disk 7 which is formed with a plurality of hook parts or horns 8 around its circumference, to which chains 9 or other flexible, connections, seeFig. 1, are to be attached.

In the utilization of such an appliance the pressure plate 1 is placed against the member as at Fig. 1, and the spur 3 is driven into the said member by blows of a hammer on the end of the stem 4, and then the chains 9 or oth r connections are attached to the hornss ofthe; horn plate 7 and a, key anner isapplied to the polygonal end .6 o the Copies of this patent may be obtained it:

calculated to be freely revoluhle itflbslet fed, a and is formed polygonal at its end 6 so that tendinfg sure p ate and rigid therewith, a sleeve hav to. he tonne ta .sion said flexible connections.

hand inthe presence of two witnesses.

s1 eve, and when the sleeve 5 is formed with right hand thread it will be observed that by turning the s anner right-handedly the connections 9 wil be tensioned to any requir" ,d il et claim as in invention and desire to secure by Letters atent it Iii dwieee for oonneoting'tc ther memten-enemas scaffold penned h'e like; the combination of a pressure platelittiring a snrfaceholbe r HAQQPQ 9 ...the members 'ai "c'ylindii'cal emmexfrom the opposite face of said presing' aplain cylindrical bore to-be lid :enao S81dtl1i i 113 i Sn orted thereon throu hout its len t said s eeve having a screw-t read forrfne externally thereon a centrally bored and internally screw-tlhmaded bloclc adapted .to be screwed onto said sleeve, means on said blockfor securing fihieto the ends of flexible connections assing'around the members otogether and-imeans by which said s eeve; can be-turned about its axis upon said stemto traverse said blcck in the endwise direction of said s eeve to ten- In witness whereof Ithave hereunto setmy t. DAMEL PALMER-JONES.

lvitnesseszi 3 E mo ,Wn. PrcknN', Sx'oNnY STEPHEN LARA.

lve centl lddreuiii g'tlie Commissioner of mime, wll i lfldil, n.fl." l 

